Download Littelfuse Selco T2600 Datasheet

Generator Control
Basic Generator Protection
T2600 Series
Dual-Current Relay
Description
The T2600 Dual-Current Relay combines two current relays.
The function of the unit is to start or stop the standby diesel
generator according to the load situation. Current is measured
as a single phase measurement in each of the generators. Both
relays will respond to the highest of the currents, independent
of phase angle.
Starting signal: The starting output relay is controlled by the
high level start current relay (0.3-1.2 x IN) with a time delay
of 3-30 seconds. If one of the 3 input currents exceeds the
current setting for a longer period than the time setting, the
output relay will become deactivated.
Stopping signal: The low level current relay (0.2-0.8 x IN)
controls a time delay (1-10 minutes) which again controls the
stop output relay. If all input currents are lower than the current
setting for a longer period than the time delay setting of
1-10 minutes, the output relay will be activated.
Simplified Circuit Diagram
L1
L2
L3
1
2
U3
I1
I2
I3
G4
G5
11
I1
12
13
I2
14
15
I3
16
19 20
G6
11
G1
CONTROL POWER
T2600
(Dual Current Relay)
12
13
14
15
START
CIRCUIT
STOP
CIRCUIT
16
Manual
G1
10 G1
START
9 G3
8
7
Manual
G1
6 G1
STOP
5 G3
4
}
}
19 20 17 18
G3
G2
Features & Benefits
To check relay operation, check that the “POWER” LED is on, ensuring that the supply is
present. Measure the supply voltage which must be compatible with information label on
top of enclosure. Measure the current circulating in terminals 11 -12, 13-14 and 15-16 and
observe that at least one of the currents are above setting. 0.5 x I N = 2.5A; 2 x IN = 10A.
Ordering Information
Terminals
Ordering
Number
1-3
2-3
T2600.0010
T2600.0020
T2600.0030
230 V
450 V
480 V
5 A 30 sec. or 1 sec.*
400 V 5 A 30 sec. or 1 sec.*
415 V 5 A 30 sec. or 1 sec.*
T2600.0040
450 V
sec.*, bridge 17-18 = stop current
400 V 5 A 30
increased 34%
T2600.0050
480 V
sec.*, bridge 17-18 = stop current
5 A 30
increased 34%
T2600.0060
110 V
100 V 5 A 30 sec. or 1 sec.*
T2600.0070
110 V
sec. or 1 sec.*,
100 V 5 A 30
start current delay 1.0-10 secs
T2600.0080
230 V
IN
function
sec. or 1 sec.*,
5 A 30
normally de-energized start relay
T2600.0090
Extension Unit
*Pulse duration time for stop signal, bridge 17-18 = 1 sec.
Features
Accepts high supply voltage
variation
BENEFITS
Ensures correct operation in spite of voltage
supply fluctuations (fulfills marine class
requirement)
Visual indication of power,
pick-up, and output trip
Provides quick and concise status information
Direct line-line or line-neutral
voltage supply (up to 690 Vac)
Simplifies design and installation.
No need for PTs.
Simultaneous monitoring
of load level on
3 synchronous generators
Economic solution for load depending start/
stop of generators in parallel operation
Combining 2 trip outputs in
same enclosure
Providing both start signal to stand-by
generator and stop signal of running
generator from same unit
Extension module available
for monitoring of additional
3 generators
Economic and easy to install system
enhancement
Galvanic isolated inputs
Protects the unit against high AC voltage and
currents from the installation including spikes
DIN-rail or screw-mount
& adjustment by
potentiometers
Easy installation
Specifications
Start Level
30-120%
Delay
3-30 sec.
Stop Level
20-80%
Delay
1-10 min.
Max. Voltage
660 V
Voltage Range
60-110%
Consumption
5 VA at UN
Frequency Range
40-65 Hz
Contact Rating
AC: 400 V, 8 A, 2000 VA; DC: 35 V, 8 A, 150 W
Overall Accuracy
±3% of highest value
Repeatability
±1%
Operating Temp.
–20°C to +70°C
EMC
CE according to EN50081-1, EN50082-1, EN50081-2,
EN50082-2
Approvals
Certified by major marine classification societies
Burn-in
50 hours before final test
Weight
0.5 kg
DimensionsH 70 mm (2.76”); W 100 mm (3.94”); D 115 mm (4.52”)
Installation
35 mm DIN rail or 4 mm (3/16”) screws
www.BDTIC.com/littelfuse
© 2013 Littelfuse Protection Relays & Controls
www.littelfuse.com/t2600
Rev: 4-A-050313